Rhonas vs. Sandwurm Convergence

Steeme

Sandwurm Convergence should prevent opposing creatures from attacking if they have flight.

If the opponent has Rhonas, and you have Sandwurm Convergence in play, casting Stratus Walk on the opposing Rhonas to give it flight does not prevent it from attacking.

This "feature" cost me the match, as the opposing Rhonas continued to attack with the Berserker Plate and proceeded to remove my creatures every turn.

Monkeynutts85

If a target creature was to gain flying you are correct it should not be able to attack and should in fact be purpled out with a X on the the power, however it can still block if it had other spells that gave it vigilance or defender for example.

Steeme

I spawned a 5/5 sandworm at the end of every turn (confirming that my support was still in play).

Opponent had Berserker Plate and also a Sandwurm Convergence.  Rhonas was in the first position with Berserker.  The Sandwurm tokens provided the 8 power requirement to allow Rhonas to attack/defend.  Despite having wings (ie. flight) due to the Stratus Walk I cast on the opposing Rhonas, he was able to attack and remove my 5/5 sandworm token every turn.

Kinesia

This is very very likely due to the special coding on Gods. Sandwurm Convergence gives a general "can't attack" but Rhonas already has "can't attack" and his special wording includes a check done _during_ combat that decides whether he can attack or not.
If his special rules apply he is being allowed to attack because there are no further limits to the check, it doesn't _just_ override his own limitation like it should.
I strongly suspect that other "cant attack" effects like the rare White "Consulate" support that stops the first creature attacking would be overridden by any of the gods too.

Monkeynutts85

This maybe a double negative generation a positive result. - - = +

Like that Floodwaters spell that caused a - then to become a + by double casting.

Or Combat Celebrant when the Cast Out effect is removed when he triggers.

In essence if it has flying then the enchantment should negate his ability to attack, but it is probably some weird coded trigger causing the effect to go off.

Kinesia

Oh, BTW I know that the checks on whether Gods can attack are recalculated throughout combat because playing around with Kefnet and creatures that draw cards when they attack he can be disabled at the beginning but the first creature attacking can draw enough cards to enable him to attack on his turn, it's checked on the fly.

Ohboy

Monkeynutts85 said:

This maybe a double negative generation a positive result. - - = +

Like that Floodwaters spell that caused a - then to become a + by double casting.

Or Combat Celebrant when the Cast Out effect is removed when he triggers.

In essence if it has flying then the enchantment should negate his ability to attack, but it is probably some weird coded trigger causing the effect to go off.

For the record, floodwaters bug wasn't a multiplication of two negatives or a boolean flip. It was an integer overflow bug.

But if I had to guess, because mtgpq seems to be written with a base set of rules that are then superceded by special rules on an individual card basis(also, it follows the first in first out rule when calculating effects) ... It's more likely that this is caused by sandwurm convergence effect first being applied on the God, then his ability triggering after, overwriting the previous condition.